Swivel head for coil-pulling machines



Oct. 2, 1928. 1,685,959

L. B. SCHMERBER SWIVEL HEAD FOR COIL PULLING MACHINES Filed March 5, 1923 2 Sheets-Sheet l Fig. 5.

- INVENTOR Lee B. Schmerber ATTORNEY Oct. 2, 1928. 1,685,959

L. B. SCHMERBER a SWIVEL HEAD FOR COIL PULLING MACHINES Filed March 5, 1923 2 Sheets-Sheet 2 Fig.6.

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INVENTOR Leefischmerbr A'TTORNEY Patented Get. 2, 1928.

warren stares,

PA mi:

LEE' B; soHM-nnBEn, on WILKINSBURG, rs1aNsvlivalrm,.assiernonmownsainar HOUSEELECTRIC emnnuracrnnme; COMPANY, a ooarone'rion or ZBE-NNSYL- VANIA.

swIvEL HEAD. FOR corn-Bummer MAon'mns,

Application filed March 5, 192a. Serial'No. 622,842.

compact structure, inexpensive to manufacture and that shall be applicable to the standard apparatus now employed. i

It is a further object of my invention to provide'such an attachment that, shall be adapted toform the coil in" a peculiar manher to adapt it more readily to the machine in which it, is to be employed. V

Coil forming or stretching machines con sist of dies and forms which are movably adjust-able to produce certain shapes of coils from simple loops, such as can readilybe formedbywinding several turns of conduc= tor material on a Wooden form. Such formmg machines are, however, limited to simple stretching operations anddo not provide for the twisting and looping of'the conductor members which is essential, as, otherwise,

the ends of: the coils will interfere with. each other in the process of assembling inthe ar mature, stator, or rotorof a. dynamo-electric machine.

My present invention is directed'to a swivel head which is adapted to be mounted on one.

end or both ends of a coil stretc'hing machine.

a looped coil and'the swivel member is so constructed as to automatically twist the end of the coil through a predetermined angle during the coll-stretching-operatloni- In the accompanying drawings constituting a part hereof and in which likereference characters designate like parts,

Figure 1 is a side elevational view of a swivel-head attachment embodying the principle of my invention;

Fig. 2 is' a front elevational'view thereof Fig. 3 is a top elevational v ew of a looped conductor member;

Fig. 4 is an elevational View of the coil (Fig. 3) after it has been formed or stretched;

Fig. 5 is an end elevational view showing the shape of the end of the coil effected by the swivel attachment, illustrated in Figs. 1 and 2 and Fig, 6 is a view, partially in. cross section, l of the swivelhead of Fig. 1', taken on the line VI-VIot Fig.2: I

Referring to Figs. 1, 2 and 6', the swivel head comprises a base member 1 having a projecting flange portion 2 by which it is adapted to be secured ltothe horizontal arm 3" of a coil forming machine (not shown).' The swivel 4 comprises an annular member 5 which is secured by screw bolts 6'to a ring Trotatably mounted'on the base 1 and en-' gaging a shoulder thereof-to prevent "the member 5 from moving laterally thereon. The swivel member 4 is further provided with a clan'iping flange 8, which is adapted" to secure a chuck 9 or other clamping mem? her for securing a coil 10. LA handle 11' is as; 1 l

hinged to a'projecting lug 12hr the swivel notches 20 provided in the 'ring 15/ The ring member 15 is further provided with a stop 22 for the finger l3 ofthe handle 11 and a plurality of grajduations 23" are provided thereon to indicate the amountof adjustment made by'the pawl and ra'tchet119; and 20, respectively.

The clamping plate 17 is providedwitha marking 24 in alinement with the zero position on the ring 15 when the handle- 11 is vertical.

. The operation of'myd'evice is briefly'a's follows: A wound conductor member 26 comprising a plurality ofloops or turns 27, is inserted in the clamp 9 and the side or slot portions. 28 are engaged by other members of the. coil-forming machine (not shown). The movable parts of the coil-forming ma chine are then actuated to stretch the coil to the shape illustrated in Fig. 4, which results in one of the coil slot portions 27'being 7' twistedat an angle, and the ends 29 and 3t) v are looped, as illustrated. shown in Fig. 5., should be twisted on an angle to facilitate assembling the coils the The. loop 30, as

slots of the armature so as to provide the roper clearance between adjacent coils.

; his twisting is accomplished by the swivel head attachment in the following manner:

The an le at which the ends 29 and 30 are who twlsted'depends ,upon the radius at which the coil-is mounted and the number of such coils in a given circumference. This angle usually varies Within the range of zero to de rees, and the swivel head is adjusted to the desired angle. by setting the ratchet pawl 19 in the notch of the ring 15 corresponding to the graduation 23, giving the angle desired. This sets the stop 22 in a certainan la'rposition relative to the finger '13 of the andle 11, which is maintained in its vertical position, as shown. 'During the coil-stretching operation, the strain applied to the ends of thecoil by the'longitudinal and lateral stretching "automatically rotates the swivel member 4, bringing the stop finger 13 against, the stop 22, resulting in the proper twist or angle on the ends 29 and 30 of the coils 10, as shown. '25

is that, b twisting the en s of the coil, the

length 0 the entire coil is materially shortened, thereby saving in the amount of copper employed. v 7

Although I have described a specific embodiment of my invention, it will be obvious to those skilled in the art that various changes .1118 be made in the details of construction wit out departing from the principles herein set fol'th, For instance, the details'of my formed, afinger on said swivel member and mechanism may be varied in design in variousways as to the kind and number of its parts without varying the function herein ascribed. r I claim as my invention L'A swivel head for a coll-forming machine comprising a base member, a swivel member rotatabl mounted thereon, means on said swivel mem er for engagmg a coil to be Another advanta e of this device an adjustable stop member on said base member for engaging saidfinger.

2. A swivel head for a coll-forming ma-- chine comp-rising a base member, a swivel member rotatably mounted thereon, means onsaid swivel memberfor engaging a coil to be formed, a fingerpivotally mounted on the swivel member and a stop on said base memto be formed, a ring member trevolubly mounted on the base member, a stop on said ring member for engaging the finger on the swivel member and means for adj usting the,

angular position of said ringmember relative to said base member.

4. A swlvel head for a co1l-form1ng machine, comprising an annular base. a swivel I member rotatably mounted thereon, a fingeron said swivelmember, a rotatable disk pro- Vided'with a stop for engaging said finger mounted on said base, said swivel member being adapted to be actuated'in an angular direction relative to said base and stop.

5. A swivel head for a coil-forming machine, comprising a base, a swivelclamp angula'rly movable thereon, a stop comprising a handle hinged on said swivel clamp, a ring provided with a plurality of notches having a recess adapted to receive the handle stop of said swivel clamp rotatably mounted on said base, and a disk provided with a spring pawl fixed on said base, said pawl being adapted to fitinto the notches of said ring.

6. A swivel head for a coil-forming machine comprising a swivel clamp, a base for supporting the swivel clamp, a ring having a projecting finger rotatably mounted on i the base for securing the swivel clamp, a

movable stop for engaging the finger provid ed with graduated notches mounted on the base and a locking plateprovided with a spring pawl for engaging said notches secured to the base. i I v In testimony whereof I have hereunto sul sgrizped my name this 21st day of February; 1 2 I LEE B. sonMERnER. 

